Adjustable table and driving mechanism for sewing machines



. (No Model.)

A R. LEY. ADJUSTABLE TABLE AND DRIVING MECHANISM FOR. SEWING MACHINES- ILQ. 256, 38. V f Patented Apr. 11, 1882.

' 1; JMM= A N. PETERS. mouihn n her, Wamin ton. n c

Name STATES PATENT Orricet RUDOLPH LEY, OFARNSTADT, GERMANY.

ADJUSTABLE TABLE AND DRIVING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 256,338, dated April 11, 1882. Application filed October 15, 1880. (No model.) Patented in Austria uly 22, 1880, and in Germany September 14, 1880.

To all/whom it may concern Be it known that I, RUDOLPH LEY, of Arnstadt,in the Empire of Germany, haveinvented certain new and useful Improvements in Adjustable Table and Driving Mechanism for Sewing-Machines; and I do hereby declare the following to be a full,clear,and exact description thereof, reference being bad to the accompanying drawings, forming part of this specification.

The present invention has for its object to furnish a sewing-machine table and band-pulleyand treadle mechanism which can be adjusted in a vertical direction, so as to adapt the sewing-machine for persons or operators differing in height.

The invention consists in the construction and combination of parts, which will be hereinafter more fully described, and then set forth in the claims. I

In the drawings, Figure 1 is a side elevation of a sewing-machine table embodying my invention. Fig. 2 is a front elevation thereof.

The letter B designates a sewing machine frame, the upper horizontal bars of which are constructed orprovided with grooved ways or guides 12, in which are fitted tongues or short arms a, projecting from the under side of the tabletop. The guides and tongues are generally connected bya dovetail joint, so as to pre' vent the disengagement thereof.

The tabie-top can be adjusted up and down in relation to the frame,-so as to carry the sewing mechanism mounted on said frame to such a height or position as will suit the height of the operator or person working the machine. This adjustment of the table-top is effected through the mediumof a lever-frame, O, and means for locking the same.

The lever-frame is composed of two side bars, which are pivoted at the point e to suitable arms on the frame and project beyond said frame, so as to be connected by the cross-bar l. The inner ends of the side bars of the leverframe are-slotted, so as to engage with the bolt f, applied to each middle guide-arm of the table-top.

A hanger or arm, 6, extending from the under side of the table-top, is suitably perforated, and serves, in connection with aforked arm,h, and transverse pin 6, carried by the transverse bar of the lever-frame, to retain the latter in a fixed position.

The table-top also carries a long downwardly-projecting arm, at, which extends alongside the frame of the machine, and is guided and retained by the grooved guide plate or way on, secured to the side of the frame.

The arm d has the arbor or shaft of the driving-wheel or band-pulley rigidly secured thereto. Said band-pulley is connected with the machine proper bythe customary belt, and is driven through the medium of the foot-treadle and pitman 70, connected with said treadle and .the crank or'wrist-pin of the band-pulley. The

pitman k is made in two parts, the upper solid part thereof sliding in the lower hollow part, and being adjustably securedv thereto by the setscrew s. A set-screw, 0, connected with the arm d,which carries the band-pulley, moves in a vertical slot made in the guide-plate of said arm, and serves as an auxiliary medium for forming a rigid connection between the-table and the frame.

It will readily be understood that when the table-top is adjusted through the medium of the lever-frame theband-pulley is carried with said top, so as not to change the position of the driving-belt. The setscrew 8 of the pitman having been loosened, the latter can also be adjusted or drawn out, so as to adapt itself to the position of the band-pulley. 7

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a sewing-machine table, the combination of the pivoted lever-frame comprising the lateral arms 0 and transverse bar I, carrying a locking device, with the vertically-adjustable table-top provided with guide-tongues a and a retaini11g-arn1,i,for the lever-frame, and the sewing-machine frame having grooved ways or guides 12, as and for the purpose set forth.

2. In a sewing-machine table, the combination of the vertically-adjustable table-top haw ing a pendent arm, d, carrying the driving or band pulley, and the sewing-machine frame provided with a guide-piece, m, for receiving said arm, and the tr'eadle having an extensible pitman, k, as and for the purpose set forth.

' BUD. LEY.

Witnesses:

HEINRICH ROTH, HUGO ScHoLz. 

